Thank you - I could've sworn I checked this key and couldn't see this key was changed after changing the permissioning.

I guess since we're using local groups for permissioning, and each local group is a different SID for machines, I'll just have to backup regkey per machine prior to upgrade, and merge it back in afterwards.

Hi Eugene, I tried running procmon to see what regkey rserver3.exe is modifying when I change the permission list, but I could not find anything obvious. Can you specify which regkey value/data I need to capture?

Is there a way to manipulate the Permissions list for Windows NT Security? For example to use a script to permission a local group to have full control - without manully configuring it through Radmin Server Settings?